bendix



vMiil'ch 19, 1929. v BEND|X- 1,705,850

BRAKE Filed sept 2,l 1925 2 Sheets-Sheet l zo 'gl 36 d l/6 Z INVENTOR 2z -VINCENT Bamm ATTORNEY March I9, 1929. v. BENDlx 1,705,850

BRAKE Y Filed Sept. 2. 1925 2 sheets-sheet 2 48 5b 5a 276 'l 27e HG' v. '27o 5 l 7,4775 'O- .5 v 4 o /0 f/- I Y @QQ/ff," H Z0 A INVENIOR VINCENT EJENDrx BY u. ATToRN|aY PATE - L trasse lei-i' if VINCENT BENDIX, OF CHICAGG, ILLINOIS, ASSIGNOR TO BENDIX BRKE COMEANY, i OE CHICAGO, I-LLNOIS, ACGRPORATION OF ILLINOIS. v

i BRAKE.

Application filed September nis invention relates to brakes, and is illustrated as embodied in an automobile chassis with its front and rear brakes.

arrange lthe parts of the brake-applying mechanism of a front or other Swivelled wheel, to permit interchangeable use'of either of two different types of controls, so that a customer may take his choice with a minimum of trouble in making the change. K

rl`he first of thel controls shown is of the type in which agcrank on the brake-applying shaft is engaged by operating means. such as a generally horizontal lever, with the joint movable in applying the brake from an idle position spaced from the swivelling airis to an active position substantially in vthat axis. When such a lever is used to operate the crank, the control may conveniently be designated a -cranlr-and-lever control. i

rlhe other illustrated control is of the type including a floating operating shaft universally and movably supported on the chassis frame at its inner end. At itsouter end the floating shaft is universally jointed to the kbrake-applying' shaft, substantially at the swivelling axis of the wheel, by means such as a yoke horizontally pivoted to the end of the lioatingshaft and having a part sleeved on a vertical pivot pin portion of anovel crank'v arm on the end of the brake-applying shaft.

@ther features of the invention relate to novel means'clamping in place the bracket carrying` the brake cam, or its equivalennto I permit the bracket to shift when the brake is applied, to center the cam; to a shoe-positinning arrangement including` a shoe-.embracing flangeV on the brake cam; to a novel single anchor for a three-slice assembly; to a clamping bolt for a brake-applying arm serving .as an adjusting device to turn they arm on its shaft; and to other novel combinations of parts and desirable particularconstructions which will bc apparent from 'thefollowing description of the arrangements illustrated in the accompanying drawings, vin which:

Fig. 1 is a vertical section through one front` Y brake and associated' parts, showing a crankandelever control in rear elevation; 1

Fig. 2 is a section through the vbrake on the kline 2 2, Fig. 1, showing vthe shoes in side elevation g Fig. 3 is, on the righta top plan view, and

'on the left,.ahorizontal section on. the line 8-'3 ofFig. 1, showing the arrangement per- 2, y1925. Serial No. 54,049.A

niitting the bracket to shift tocenter the cam; Fig. l is a section on lthe line 4 4 of Fig. 2,

showing the'ends of'two of the shoes in ele- An important object of the invention is to vation, looking outward radially of the drum; Fig. 5. is a view corresponding to Fig. 1, but showing the other or chassis-supported control;

Fig. 6 is a partial inside elevation of one of 'the rear wheel brakes, showing an arm which is there used y to rock lthe brake-applying shaft;` and t l Fig. 'l' is a vertical section through the bottom of one of the rear brakes, illustrating av device for preventing oil from dripping from the end of the axle on to the brake shoes.

ln the arrangement of Fig. 1, a brakeA drum 1() lrotates with a wheel 12 rotatably mounted by ball4 bearings 14 on the spindle 16 of a knuckle 18V swivelled, by means such as the usual king pin, to one end of the front axle 20. vThe knuckle 18 also carries astationary support such as a backing plate 22 closing the open side of the drum. f

Between drum V1() and the backing plate 22 is arranged the friction means, shown as including a central shoe 24, areverse end shoe 26, and a floating forward end shoe 28. Each of the two end shoes 26 and 28 is forked to provide arms 30 (Fig.-l) straddling one end of the central shoe 24. A pivot pin 32 passing through alined openings in each pair of arms 30 and` in the central web of shoe 24, serves as a l pivotal connection between the shoes. Preferably each pin 32 is smooth, and is held in the 'alined openingsonly by sliding engagement of its head 34 with the backing plate 22, thus facilitating `assembly of the shoes. v f

At its end on the rear side of the brake, the central shoe 24 is anchored by having` a part pivotally sleeved on an anchor or post 36 projecting from the backing plate 22 through.

relatively large openings 38 in arms 3() rof shoe 26. Shoe 26 prevents shoe 2l from mov# ing axially of the anchor, and shoe 26 is held by a washerll() and cotter pin42 on `the end of the anchor.

Return springs 44 and 46 urge the shoes away fi'om the drum, and are overcome in applying the brakevby means such as a double cam- 48 having a shaft 50 journalled in a bracket 52. Thefree ends of shoes 26 and 28 are confined laterallybetweenbracket 52 and a flange' on cam @48. It will be seen that, with the wheel and drum removed and return roo spring 44 disconnected at one end, shoes 26 and 28 may be swung outwardly to disconnect them from flange 54, whereupon by removing cotter pin `42, the whole three-'shoe assembly may be removed as a unit. Y e

Bracket 52 carries threaded studs or bolts 56 projecting through larger openings in backing plate 22, the bracket being yieldably clamped to the backing plate 22 by nuts 58 threaded on the studs and compressing springs or washers 60 (Fi 8). Each nut 58 is shown with a shoulder projecting through the opening` in the backing plate and seating vof shaft 5'O'and bracket 52, `shaft 5() may have an axial. passage 62 (Fig. opening outside the backing plate and having' any'suitable 'Y lubricant fitting, and intersected by a cross the joint between lever 72 and crank 70 is passage64 extending diametrically entirely throughthe shaft, and shown plugged with wicking. y

Shaft 50 terminates approximately in the swivelling axis'of the wheel, and is formed with a worm thread 66 (Fig. l) near its end meshing with a thread on a clamping bolt 68 passing loo'selj7 through the opposite sidesl of the split hub of a crank or arm 70 sleeved on the end of the shaft. By rotating bolt 68 about its axis, crank 7 O may be turned angu-l larly withrespect to shaft 50, to adjust with respect to the swivelling axis of the wheel the active position of its ball end, which is operatively engaged by a vertical plane surface on the end- 'of an generally horizontal brake-operating lever 72 fiilcriiined between its ends on the axle 20. Any desired adjustnient of lever 70 is preserved by tightening up a init '74 on bolt 68. This construction is Vclaimed in my application No. 106,307, filed VMav 3, 1926.

lVhen the brake is applied by the abovedescribed connections, the joint between lever 72 and crank 7() is moved substantially horizontally forii'ard from an idle position spaced behind the swivelling axis of the wheelto an active position substantially in that axis. A

control. ofthis character may conveniently be designated a @crank-and-lever control. lf it desired to relieve the pressure on the outer vbrake on a turn, the-'two front brakes are not equaliz'ed, and the active position of not exactly in the sw'ivelling axis, but is spaced a fraction" of an inch from that axis Vtoward the wheel, as explained in my prior When usedon a rear wheel, an ai'in 170 (Fig. 6) is substituted for the arm 70, being l ing` 174 (Fig. 7) cut out to encircle closely y the driving hub part 176 just beyond the vend the end of the axleohousing.

One of the important features of the invenof the usual casting 178 which is carriedY by tion relates to providing a control of the n chassis-supported or Perrot type which is interchangeable with the .crank-and-'lever vcontrol and with the rear brake control described above.V This novel interchangeable control is shown in Fig. 5,. f

ln this case, there is clamped on the end of shaft 50, by the saine adjusting andclamping 270, having a cylindrical pivot pin portion 272. This arm is so arranged on the shaft that, when the brake is applied, the axis of portion 272 is substantially vertical, and in a vertical plane including the axis of the spindle 16 and the swivellingV axis of the wheel.

n A yoke or other connecting member 274 hasl upper part formed with a cylindrical bolt 68, an upwardly-extending ,crankV arm bearing sleeved on the pivot pinportion 272 of crank arm 270, and held by a nut 276, this constituting the vertical part of a novel universal joint. The horizontal part is formed by pivoting yoke 274 to a horizontal floating shaft '276, by a horizontal pivot 2783. `Pivot 278may be a separate member, or may be formed integrally on yoke 274 and project into an opening in 'the end of the floating shaft 276, or it may be formed by bending- 'Y the shaft at right angles and journalling the bent end in a sleeve formed in yoke 274.

The inner end of shaft 276 carries an operating arni 280, connected in any desiredinanner to the pedal or other opera-ting means, and is niovably and universally supported'on the chassis'frame 282 by a ball-and-socket.

connection with an arm 284 pivoted onthe chassis fi'ainc.

If the front brakes are not equalized, and since the axis of portion 272 of the universal joint is at an acute angle to the inclined swivelling axis of the wheel', the pressure on the outer brake will automatically be relieved .llll

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on a turn, inthe manner usual with Perrot controls.

Bvthe above-described arrangement it'will u y "D 7 be seen that the improved brake can be usedv without change with either arear control, a

crank-an d-lever-control, ora 'Perrot control.A

It is even possible, by providing bosseson all application 170.126,036, tiled April 27,1925. the front axles for levers 72, andby punchine ing all the frames for the brackets carrying arms 284i, to give any particular ar buyer his same car with either the crank-and-lever or Perrot control, as he prefers. Vlt is not my intention to limit the scopeot' the invention to the particular Vconstructions described above, or otherwise than by the terms or the appended claims.

I claim v l. ln a brake having a rotatable drinn and an adjacent stationargv1 support, operating mechanism including` a 'shaft jonrnalled in said support, an axial lubricant passage opening at the end of the shatt outside the drum, a cross passage through the shaft intersecting the axial passage and supplying lubricant to the bearing surfaces of 'the shalt and support, and an operating arm on the shattouts' drum arranged to leave the end of the axial lu bricant passage unobstructed. v 4

2. A one-piece cani yand shaft inclading cylindr'cal shai't portion having a worin thread near one end, a cam portion at the other end. of the shaft portion, and a flange at the eXtrenieend of the cam portion away from the shaft portion.

8. A one-piece cam and shatt including a c lindrical shaft ortion havino'. a worin` l thread near one end,a cam portion'attheother end of the shaft portion, in combination with an arm having a split hub encircling the threaded part of saidshatt portion, and a clamping bolt forA the split hub having a worm thread meshing with the thread'of the shaft portion and rotatable to adjust thea 'in angularly on the shaft.

4. A' brake comprising, in combination, a druin, a backing plate,'r`riction means between the drum and backing plate having adjacent free ends, a cainbetween the tree end s having a shaft extending through a relatively large opening in the backing plate, a bracket in which the shaft isjournalled having clamping parts extending through relatively large openings in the backing plate, and nuts threadedon said parts Yto clamp the bracket to the backing plate, the nuts having shoul'- ders passing through said openings and engaging the bracket to give a predetermined limited clan'iping y pressure permitting` the bracket to shit't slightly. when the brake is applied, to center the cani.

5. A brake comprising, `in combination. a drum, a backing plate. Jfriction means be- Vlacent free ends, expanding means engaging tween the drum and backin plate having ad-r predeteri'nined' limited clamping pressure permitting the bracket to shift slightly, when the brake is applied, t0 center said means.

6. brake comprising, in con'ibination, a pair of shoes, one of which is `forked to form arms straddling the other, a pivot connecting the Jrorked end of the one shoe to the other shoe between Vits ends, an anchor for the straddlcd end of the other shoe passingl through rela-v tively large openings in said arms, and means on the end of said anchor engaging the outer one of said arms to position both shoes laterally and prevent them from moving arially of the anchor.

7. A brake comprising, in comhination` a pairofshoes-,one of which is formed to overlap the other, a pivot connecting the overlapping end of the one slice to the other shoe between its ends, an anchor for the overlapiiied end ot the other shoopassmg through a relatively vlarge opening in said overlapping shoe, and

means on the end of said anchor enga io' n v u said overlapping shoe to position both shoes laterally and prevent them from moving are ially of the anchor.

8. Abrake assembly comprising, in combination, a backing plate, a brake shoe anchored on said plate, another brake shoe forked to form arms straddling the anchored end ofthe tirst slice, and pivot pin connecting the ends of the arms to'said anchored shoe between its ends and having a head slidably engaging the backing plate.

9y A brake assembly comprising, in combination, a backing plate, a brakek shoe anch-ored on said plate, another brake shoe formed to overlap the anchored end or the first shoe, and a pivot pin connecting the end of the overlapping shoe to said anchored shoe between its ends and having a head slidably engaging the backing plate.

l0. A singleanchor three-shoe `brake comprising, in combination, a central shoe anchored'at one end, a pair of end shoes pivot-v ally connected to the central shoe adjacent its opposite ends to form a connected assembly, and a cam between the free ends of the end shoes having a flange confining said ends laterally, the assembly of three shoes being removable by swinging'the end slices free of the cam flange and disengaging the central shoe from its anchor. f

ll. fr single-anchor three-shoe brake coniprising, in combination, a central shoe anchored at one end, a pair ot end slices each forked to 'torni arms straddling one end of the central shoe, the arms being pivotally connected to the central shoe between its ends to torni a connectedassembly, and a cam betral shoe between V'the backing plate, a central shoe having one end pivotally sleeved on said anchor, a pair of end slices overlapping opposite ends of the central shoe, the end shoe at the anchored end 0f the central shoe having a relatively large opening` through which the end of the anchor projects, means on the end of the anchor engaging the side of said end shoe to prevent movement of the shoes axially oin the anchor, and pivots connecting' the end shoes to the central shoe between its ends.

13. A single-anchor three-shoe brake coinprising, in combination, a backing plate, an anchor member carried by the backing plate, a central shoe having,` one end pivotally sleeved on said anchor, ya pair of end shoes overlapping opposite ends of the central shoe, and pivots connecting the end shoes to the cenits ends and having heads slidably engaging; the backing plate,

` *14. A vehicle having` a swivelled Wheel with a brake, and comprisinvg', in combination therewith, a brake-applying device, a suppoit sivivelling,- with the Wheel, a bracket car'- `i'yina` the brake-applyingdevice and clamped to lthe support lightly-enough to permit the bracket to shift when the brake is applied to center the brake-applying,` device, an arm carried by the bracket and operating said device and having a part movable in applying` the y brake :trom an idle position spaced from the swivelling axis to an active position substantially in that axis, and birdie-applying meansv engaging said part of the arm. Y

l5. A brake comprising, in combination, friction means having adjacent free ends,'a support, a brake-applying'device engaging said ends, a bracket carrying the brake-applying' device, and means 'for yieldingly clamping` the bracketV to the support to permit it to shift when the brake is applied to center the br lie-applyingdevice. l n

16. A brake comprising, in combination,

friction means havingA adjacenti'ree ends, a-

support, a brakeapplying device engaging said ends, a bracket carrying the brake-applying device, and means for yieldingly chiinping` the bracketto the support to permit Y it to shift When the brake is applied to center the brake-applying device, said means in said ends, a. bracket .carryingthe brake-ap plying device and having' threaded members projecting through relatively'large openings in the support, springs sleeved on said mem-V bers, and nuts threaded on said members'and compressing the springs, the bracket being shiftable when thebrake is applied automatically to center the brakeapplying device.

ln testimony whereof I have hereunto signed my name' f vironnr nnnnix; 

